Power air-pump for automobiles.



W. J. SPENCER. POWER AIR PUMP OP AUTOMOBILES. 'APPLIOATION FILED JULY24. 1908.

924, 1 1 5. Patented June 8, 1309.

" THIIIIIIIIIIH partly in vertical section and partly in side tails ofconstruction and combinations of which is rigidly connected by a web 12with chase-plate 13 located in the plane of the WILLARD J. SPENVER. OF WAT E R B URY. (Oh NECTICUT;

POWER AIR-PUMP FOR AUTOMOBILES hpecification of Letters Patent.

.Patented June 8, 1909.

Application filed July 24, 1908. Serial No. 445,282.

[0 all whom it may concern: 1

Be it known that l, VVILLARI) J. SPENCER, a citizen of the UnitedStates, residing at VY'aterbury, in the county of New llaven and Stateof Connecticut, have inventeda new and useful Improvement in PowerAir-Pumps for Automobiles; and I do hereby declare l *the following,when taken in connection with l the accompanying drawings, and theletters i of reference marked thereon, to be a full, clear, and exactdcscriptionof the same, and which said drawings constitute scc.iiication, and represent, in-' Figure 1 a view in front elevation ofa power air-pump constructed in accordance with my invention. Fig. 2 aview thereof elevation. Fig. 3 a detached view of the eccentric with itsoperating arm. Fig. 4 an edge view thereof, Fig. 5 a detached plan viewof the dog. Fig. 6 an edge view thereof. 3

My invention relates to an improvement in power air-pumps forinstallation upon aui tomobiles for furnishing compressed air forwhatever purpose it may be used, the object being to produce'a simple,compact and convenient ump of the type shown in my pending a picationfiled November 25th, 1907, Seria No. 403,702, in so far as thebase-plate and driven wheel arelocated in the same plane for enablingthe pump to be installed upon the frame of an automobile without the useof a bracket or other intermediate part.

With these ends in view my invention consists in a power air-pump havingcertain departs as will be hereinafter described and pointed out in theclaims.

In carrying out my invention as herein shown I employ a driven-wheel 2furnished with a band 3 of leather or other suitable materialand'mounted upon an eccentric 4 having an operating-arm 5 long enough toextend beyond the eriphery of the wheel 2. Said eccentric 1 is ormedwith an eccentric openingfi receiving a bushing 7 which in turn receivesthe trunnion 8 of a crank shaft 9 with which the rod 10 of the piston isconnected, the said piston not being shown but understood to be locatedin the cylinder 11 driven wheel 2 as clearly shown. In other words, theeccentric is mounted upon the projecting end of a bushing which receivesone end of the crank-shaft, the said bushing part of this being mountedin a frame'comprising a rigidly connected cylinder and base-plate.

preference the said cylinder and baselath are cast in one piece. Bylocating the driven-wheel 2 and base-plate 13 in the same plane, thepump may be applied directly to,

the frame of an automobile; that is to say,

without the use of a bracket or an interme diate part for theconnection. '1 e drivem wheel 2 turns upon the eccentric which forms ahub-like bearing for it, the eccentric being normally stationary. Totransmit the rotation of the said wheel 2 to the trunnion 8 for therotation of the crank-shaft 9 and the reciprocation of the piston-rod10, I employ a coupling in the form of a dog 14 having an openingloadaptedrto lit the reduced outer end 1.6 of the trunnion 8, the dogbeing keyed to the trunnion by means of a key 17 entering slots 18 and19, the former:

the crank-shaft might be employed. For

this urpose 1 also employ a set screw 20 radia ly mounted in the innerend of the dog for engagement with the end 16 of the trunnion S. Theouter end of the dog is formed with a heavy projection 21 entering aradial slot 22 in the driven-Wheel and traveling back and forth in theslot according asthe wheel is changed in position by the shifting of itseccentric 4. Under this construction, therefore, the wheel remainscoupled with the crank-shaft though free to be moved toward or away fromthe center thereof. bush- The ing 7 before mentioned bears in thecylinder 11 and in the cap 23 thereof, the said cylinder and cap alsoaffording bearing for the bushing 24 of the other trunnion 25 of theshaft 9, the said trunnion 25 corresponding to the trunnion 8 barringthat it has no extension 16. A cap 26 applied to the wheel 2 by screws27 closes the recess 28 formed in the wheel for the reception of thecoupling dog 14. v

It will be understood. that. by operatin the arm 5 of the eccentric 4the driven whee 2 may be moved radially for a distance decourse, uponthe location of the fly-wheel of 1 the motor with respect to thedriven-wheel of the eccentric. All that is required to use i the pump isto swing the arm 5 so as to cause l theeccentric 4 to move thedriven-wheel into i action. The cylinder 11, web 12 and baseengagementwith the tly-wheel of the motor. A corresponding reverse movement of thearm 5 breaks the connection between the i driven-wheel and the fiy-wheeloi the motor 1 and, so to speak, cuts the air-pump out of plate 13 arecast integral with each other and form the frame of the pump.

1 claim 1. In a power air-pump for installation upon automobiles, thecombination with a frame comprising a cylinder and a baseplate which arerigid with each other, of a crank-shaft mounted in the said frame, anormally stationary eccentric mounted upon the crank-shaft whichrevolves within the eccentric, a driven wheel mounted upon the eccentricupon which it turns'as upon a hub, means for connecting the driven wheelwi' h the crank-shaft for the transmission of the rotary movement of theformer to the. latter, and means for moving the eccentric, whereby 1 thedriven wheel is moved radially with respect to the crank-shalt.

2. In a powerair-pump for installation upon automobiles, the combinationwith a frame comprising a cylinder and a baseplate which are rigid witheach other, of a crank-shalt mounted in the said Frame, a normallystationary eccentric mounted upon the crank-shaft which rotates withinit, a

driven wheel, and means for connecting the said wheel with the saidcrank-shaft for the transmission of the rotation of the former to thelatter.

3. In a power air-pump for installation upon automobiles, thecombination with a frame comprising a cylinder and a base plate whichare rigid with each other, of a crank-shaft journaled in the. saidframe, a normally stationary eccentric mounted upon the crank-shaft, adriven wheel mounted upon the. eccentric upon which it: turns as upon ahub, a dog for coupling the driven wheel and crank-shaft so as to permitthe wheel to be moved radially with respect to the said shalt, wherebyby -moving the eccentric the driven wheel may be moved radially andstill remain coupled with the crank shaft.

4. in a power air-pump for installation upon automolnles,'thecombination with a frame comprising a cylinder and a base.- plate whichare rigid with each other, of a bushing mounted in the said frame andprojecting therefrom, a crank-shalt having one end journaled in the saidbushing, :1. normally stationary eccentric mounted upon the projectingend of the said bushing, an arm for operating the eccentric, adriven-wheel turning upon the eccentric, and means for transmitting therotation ol the wheel to the crank-shaft, whereby the turning of theeccentric by its arm shifts the position of the wheel with respect tothe crank-shaft.

in testimony whereol', have signed this specification in the presenceoltwo subscribing witnesses.

Wllilniltl) J. SllGNUl lli. Witnesses GEORGE l). SEYMOUR, CLARA l1.Winn).

